hypersensitivity

Question 1

the first three type of hypersensitivity are mediated by

Answer 1

anti-bodies

Question 2

the fourth type of hypersensitivity is mediated by

Answer 2

T- cells and macrophages

Question 3

what are the 4 common sources of allergens

Answer 3

inhaled, injected, ingested, contacted

Question 4

type 1 sensitivity is mediated by

Answer 4

IgE bound to its Fc receptor on mast cells

Question 5

type 1 occurs

Answer 5

immediately after contact

Question 6

type 1 can cause….if not treated

Answer 6

anaphylaxis

Question 7

type 2 hypersensitvity is mediated by

Answer 7

IgG or IgM binding to specific cells or tissues ( cytotoxic)

Question 8

hypersensitivity 2 causes

Answer 8

cell destruction

Question 9

what is an example of hypersensitivity type 2 reaction

Answer 9

• transfusion reaction
  -hemolytic anemia in borns

Question 10

hypersensitivity type 3 is mediated by

Answer 10

immune complex which persist and are deposited in tissues and organs

Question 11

type 3 results in

Answer 11

complement and effector-cell-mediated damage

Question 12

what are introduced to the cell in type 4 hypersensitivity

Answer 12

haptens

Question 13

type 4 causes what to be produced

Answer 13

Th0 which induces other T- cell helpers

Question 14

what type of sensitivity is contact dermatitis

Answer 14

type 4

Question 15

why does contact dermatitis occur

Answer 15

small molecules are forming a hapten-carrier-like complex n

Question 16

which type of hypersensitivity is fatal fastest

Answer 16

anaphylaxis